Shower rooms and bathrooms are vulnerable areas for water penetration

Shower rooms and bathrooms are at risk from water penetration through a natural stone finish since stone is a permeable material and through grouting joints. In this way water can enter floors and walls thereby causing substantial damage to adjacent areas.

In the case of high value residential conversions or similar new build properties, best building practice now calls for the construction of a water proof shield to prevent damp/water penetration. Various methods have been developed by the construction industry to prevent such occurrence. But most rely on the use of jointed sections which do represent area of potential weakness.

Oysters G.R.P. Sealing Systems

Oysters proactive shield is formed from g.r.p. composite materials which are applied by hand using resin and gel-coats of marine grade that are of Lloyds Certified quality. These composite materials form an integral seamless membrane which covers the floor area and continues up the walls to a height of 150mm or to a specified height up to ceiling level, where it can be bonded to a g.r.p. vaulted ceiling. This membrane is applied by highly skilled specialists who take great care to ensure that a good finish is achieved on the sub-strat provided by the builder for the marbling or tiling work which follows. We are able to apply g.r.p. membrane to various forms of sub-srat provided and we can also bond in the waste outlets.

G.r.p. is a material completely unaffected by temperature conditions and, moreover. is one that is impervious to water even when submerged. Oyster g.r.p. lining therefore provides a hard, water impervious barrier on top of which marbling or tiling work can take place. A sand blinded finish can be provided in areas where this is needed.

Further Information

We will be pleased to receive enquiries for further information and will gladly provide our quotation on receipt of relevant specifications.

1.) GRP tanking in this situation a shower, is lined out in plywood to falls to the drain the waste is rebated into the plywood. The tanking can be applied to most substrates i.e. concrete, brick, plasterboard as well as plywood.
2.)Glass fibre chopped strand mat is applied with marine grade polyester resin, to the entire area. Lapping on to the waste, a clamp ring is then secured to the waste to trap and seal the GRP membrane.
3.) A coat of Marine grade polyester gel coat is applied to the GRP membrane. This can be to any colour. This completes the tanking process.
4.) If tiles or stone such as marble, granite or limestone are to be the final finish then a coat of sand is dusted into the wet coat Gel coat to allow a good key for fixing to.
5.)The finished Shower covered in white tiles.